diffusion experiment: my experiment was to cut an agar cube into 64 pieces and place it into different volumes of water. we placed it into 200 mL ( slope of 24) , 600 mL (slope of 12) , and 800 mL (slope of 8). The slope is from the graph, its rate of diffusion graph from each volume.

a. which had the largest affect on the rate of diffusion?

b) Based on your experiments, discuss at least two adaptations that affect diffusion in living organisms (physiological, structural, or behavioral features that evolved due to a selective advantage that was based on diffusion) . Do these match with the factors you identified in a?

True or False

41. There are only two things a company can do with its profits, pay dividends and retain profits.

42.The investment cash flows for a project typically carry a positive sign.

43. A positive of NPV is its currency units.

44.A project uses the WACC of the country where the capital is raised regardless of where the project is built.

45.The CAPM approach is too difficult to be used often as a project's cost of equity.

47.Flotation costs are a measure of how much it costs to raise funds.

48.A board of directors oversees executives in a firm.

50. WACC is a measure of a company's marginal cost of new funds.

15. A Pew Poll in 2010, found that 50% of adults aged 25-29 had access to only a cell phone, while 40% had access to both a cellphone and landline and 10% had access to only a landline. We wish to conduct a Goodness of Fit Test to see if the results of a poll of a random sample of 130 adults aged 25-29 are significantly different from the 2010 poll results.

The random sample of 130 adults found that 69 had access to only a cell phone, 39 had access to only a landline, and 22 had access to both types of phones.

Which of the following are the correct null and alternative hypothesis for this test?

16. A Pew Poll in 2010, found that 50% of adults aged 25-29 had access to only a cell phone, while 40% had access to both a cellphone and landline and 10% had access to only a landline. We wish to conduct a Goodness of Fit Test to see if the results of a poll of a random sample of 130 adults aged 25-29 are significantly different from the 2010 poll results. The table below presents the observed results.

Compute the expected count for the "BOTH" cell.

17. A Pew Poll in 2010, found that 50% of adults aged 25-29 had access to only a cell phone, while 40% had access to both a cellphone and landline and 10% had access to only a landline. We wish to conduct a Goodness of Fit Test to see if the results of a poll of a random sample of 130 adults aged 25-29 are significantly different from the 2010 poll results.

The random sample of 130 adults found that 69 had access to only a cell phone, 39 had access to only a landline, and 22 had access to both types of phones.

The chi-square statistic was calculated as 9.73 and has a p-value of 0.0077.Using α=0.01 what can you conclude?

18. According to the CDC 2.8% of high school students currently use electronic cigarettes. A high school counselor is concerned that the use of e-cigs at her school is higher.

A test of the following hypothesis Ho: p = 0.028 Ha: p > 0.028 is conducted using a random sample of 50 students at this school and the null hypothesis is rejected. What conclusion can the counselor make?

Lillis Manufacturing makes a variety of industrial fittings. The products are similar, but not identical, and all go through the same processes. Some orders from Lillis go to companies in regions with strict environmental regulations. Lillis is required to conduct compliance tests on those orders before shipment.

The company produces to order and uses a job costing system. Overhead is applied to jobs based on direct labor cost. The cost analyst at Lillis recently put together an estimate of overhead for the coming year, which is shown in the following table.

Three jobs were started and completed in November. Details on the jobs follow.

Lillis is considering adopting an activity-based costing system. The cost analyst has studied the system and has recommended the following cost drivers for each of the overhead categories. She has also estimated the annual volume for each of the cost drivers. This information follows.

The average direct labor rate at Lillis is $120 per hour.

Required:
a. What is the unit cost for each of the three jobs started and completed assuming Lillis uses their current costing system? (Round your answers to 2 decimal places.)
b. What is the unit cost for each of the three jobs started and completed assuming Lillis adopts the ABC system as designed by the cost analyst? (Do not round intermediate calculations. Round your final answers to 2 decimal places.)

Last year you could get a​ hamburger, fries, and a cola at​ Francisco's​ Drive-In for $2.50. Since the price of a hamburger has increased 20%, the price of fries has increased 40%, and the price of a cola has increased 50%, the same meal now costs $3.42, If the price of a cola is now 6 cents more than that of a​ hamburger, what was the price of each item last​ year?

Assuming that the population is normally​ distributed, construct a 95​% confidence interval for the population mean for each of the samples below. Explain why these two samples produce different confidence intervals even though they have the same mean and range.

Sample A   1 1 2 4 5 7 8 8

Sample B   1 2 3 4 5 6 7 8

You are hired as a junior manager at a state-owned institution at the beginning of 2021 with a salary of $100,000. You must choose between two retirement plans in the first week of your employment. This choice cannot be reversed. The two alternatives are:

• the state’s defined benefit plan (DBP): under which you will receive annual retirement benefits determined by the following formula: 1.5% * years of service * salary at retirement.
• a defined contribution plan (DCP): under which the institution will contribute each year an amount equal to 8% of your salary to your retirement fund.

You assume that salaries will rise by 3% a year, the interest rate and return of retirement assets will roughly match the market index return of 8%, you will retire after 35 years (end of 2055), and receive retirement payment for the subsequent 25 years (between the end of 2055 and the end of 2080).

1.) What is the amount of PBO under the DBP for your employer at the end of 2021? Hint: present value at the end of 2021

You are hired as a junior manager at a state-owned institution at the beginning of 2021 with a salary of $100,000. You must choose between two retirement plans in the first week of your employment. This choice cannot be reversed. The two alternatives are:

• the state’s defined benefit plan (DBP): under which you will receive annual retirement benefits determined by the following formula: 1.5% * years of service * salary at retirement.

• a defined contribution plan (DCP): under which the institution will contribute each year an amount equal to 8% of your salary to your retirement fund.

You assume that salaries will rise by 3% a year, the interest rate and return of retirement assets will roughly match the market index return of 8%, you will retire after 35 years (end of 2055), and receive retirement payment for the subsequent 25 years (between the end of 2055 and the end of 2080).

What is the amount of PBO under the DBP for your employer at the end of 2021? Hint: present value at the end of 2021